Ford, 74, landed on a taxiway at John Wayne Airport in Orange County, Calif., on Monday, mistaking it for a proper runway. In the process, the “Indiana Jones” star flew over an American Airlines 737 carrying 110 passengers and six crew members, then reportedly asked air traffic control, “Was that airliner meant to be underneath me?”

FAA briefs have stated that common underlying causes of similar errors include the taxiway being the dominant visual feature from the air (usually based on its width or visual contrast from the color of the pavement), a taxiway having squared instead of rounded edges and natural lighting conditions, like sun glare or haze, which can hinder a pilot’s positive runway identification.

At John Wayne Airport, the 20L runway marker is marked on the same light-colored pavement that’s used on the taxiway, even though the actual 20L runway pavement is darker. Runway 20R is marked on darker runway pavement.